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Author Topic:   What do you guys think about Synthetic Oil?
modman
Administrator
posted February 14, 2000 01:34 AM
Looking for some input, we are thinking of running synthetics in the racecar.


bbracer17
Member
posted February 14, 2000 07:40 PM
I have used Amsoil in my street cars and race cars for about five years with no complaints. I run it in my street cars for about 15,000 miles before changing it.


LAYNE_Trans
Member
posted February 14, 2000 10:38 PM
synthetic is great, especially in manual gear boxes and rear ends as it is significantly more efficient than conventional gear lube. If you run alcohol and have to change your motor oil frequently it can get expensive though inthe crankcase.


4b316
Member
posted February 15, 2000 07:14 AM
BBracer17,What kind of oil pressure are you running with this syn. oil? I ran 20/50 Castrol in my new engine (because thats what the engine builder said to run)but it was a concern when I seen I was only running 25-30 lbs.of pressure.The next week I went back to valoline 50 racing oil and my pressure went back to 70-80 lbs.Now I know you don't need to run high pressure with a syn,but I was seeing that I was paying more attention to the oil gauge than I was the race track so I needed to put that thought out of mind.Just was wondering about your thoughts on this.


bbracer17
Member
posted February 15, 2000 04:18 PM
I run Amsoil Series 2000 20-50w and when the
engine was warm like after hot laps the oi pressure would be 45 to 50 pounds at about
3000 rpm. By the way this is a Chevy 327 using a high volume pump if that matters at
all.


modman
Administrator
posted February 15, 2000 04:25 PM
thanks for the input you guys, I am leaning that way, and was just wondering about it. Anyone else got any input?


owracer
Member
posted February 15, 2000 08:09 PM
I have used straight synthetic oil and synthetic blends. Have no complaints about either one.I like synthetic because heat doesn't break it down like it does conventional oil.Generally change oil after six races.


A25WRENCH
unregistered
posted February 16, 2000 06:58 AM           

I HAVE BEEN SELLING SYNTHETIC RACING OIL AND ADDITIVES FOR YEARS. I WAS PRIVILEGED TO RUN OIL ANALYSIS ON OUR IMCA MOD. RUNNING ALCOHOL. THE COMPANY CHEMIST SUGGESTED TO CHANGE THE OIL AFTER THE EIGHTH NITE BECAUSE OF FUEL DILUTION AND SILICA [DIRT] LEVELS WERE GETTING CLOSE TO THE DANGER LEVELS. WE DID CHANGE THE FILTER AFTER EVERY TWO RACE NITES AND REFILLED WITH OIL. WE ALSO CHECKED TRANS. AND DIFF. TEMPS WITH SYN. GREASE AND FOUND TEMPS DROPPED ABOUT 20 DEG. ON AVERAGE. WITH THIS OIL WE RAN ABOUT EIGHT LAPS ONE NITE AT 7400 RPM'S WITH NO OIL PRESSURE [ NOT SMART BUT WE WERE RUNNING SECOND IN A $1,000 TO WIN SHOW]. FOUND PAN HAD HOLE IN IT AND HAD LOST ALL THE OIL. PULLED PAN AND FOUND ALL BEARINGS EXCELLENT CONDITION. REPLACED PAN AND RAN ENGINE 5 MORE NITES WHEN IT THEN, BROKE ROD ON A ROUGH RACE TRACK BUT BEARINGS STILL WERE IN GOOD SHAPE AND HAD NOTHING TO DO WITH BROKEN ROD. NEEDLESS TO SAY I BELIEVE IN SYNTHETICS AND WON'T RUNNING ANYTHING ELSE.


racing69
Member
posted February 18, 2000 05:52 AM
I to have used synthetic oil in my race motors. The only time I've had a problem was when I wasn't using after about the second month of racing.
Now, here's my question!
According to ALL reports I've read, never start out a new/fresh engine on synthetic. Now in a normal street car, "experts" say to use regular oil for the first 10,000....SO, what does that translate into in racing "miles"???
The latest scoop was even NASCAR rear-end specialist are breaking in their punkins with regular oil for practices/testing, then switching to synthetic for time trials and race.


A25WRENCH
unregistered
posted February 18, 2000 06:33 AM           
WE ALWAYS START A FRESH ENGINE ON REGULAR OIL AND RUN IT AS MUCH AS POSSIBLE, RUN FIRST HOT LAPS WITH REG. OIL BUT CHANGE TO SYN. BEFORE ALL OUT RACING. THE SYNTHETIC WE RUN HAS AN ADDITIVE THAT CONTAINS A LUBRICITY PACKAGE THAT WILL MAKE RINGS SLOW TO SEAT, THAT IS THE MAIN REASON FOR RUNNING REG. OIL DURING BEAK-IN. WE BREAK-IN TRANS. AND REAR. GEARS WITH REG. GEAR OIL WITH NO LOAD THEN CHANGE TO SYN. BEFORE RACING. SEEMS TO WORK FOR US.


modman
Administrator
posted February 18, 2000 06:48 AM
Makes sense.


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